Specification:
Product Name: Oxygen Mask
Material: Medical grade PVC
Color: Green
Size: S, M, L, L+, XL 
Package: PE bag
Tube size: 2m
Nose Clip: adjustable
Disposable Medical Oxygen Face Mask Types MSLMK01
Intended Use:
An oxygen mask provides a method to transfer breathing oxygen gas from a storage tank to the lungs. Oxygen masks may cover only the nose and mouth (oral nasal mask) or the entire face (full-face mask).